Type assembly



B. w. SCHABOT 2,426,156

TYPE ASSEMBLY 7 Filed 001;. 15, 1943 2 Sheets-Sheet l NTOR f BY

A 0 1 ORNEY? Patented Aug. 19, 1947 UNITED STATES PATENT OFFICE TYPE ASSEMBLY Bernard W. Schabot, Ferndale, Mich.

Application October 15, 1943, Serial No. 506,357

3 Claims. 1

This invention relates to a pantographio marking machine.

Marking machines are usually single purpose machines, that is, they are adapted for the marking of a single type or"- tool or article.

This invention contemplates a pantographic marking machine which is universally adapted to the accurate marking of any object irrespective of size.

It is also an object of this invention to produce a pantographic marking machine in which the type can be set or changed easily.

Fig. l is a top plan view of the pantographic marking machine.

Fig. 2 is an elevation of the same.

Fig. 3 is a detail of the pantograph and type assembly table.

Fig. 4 is an end view of the type clamp: shown in Fig. 5.

Fig. 5 is a plan view of. the type; clamp.

Fig. 6 is a plan view of one piece of type.

Fig. 7 is a. section along the line I--I of Fig. 3.

Fig. 8 is a sectional view of the piece. of type taken along the line s a or Fig. 6.

Fig. 9 is a section along the line 9--9 of Fig. 3.

Referring more particularly to the drawings it. will be seen that the marking. machine. com-- prises a post I. upon which is. supported. for vertical. adjustment a support.- arm 2 for the work table 3. This permits one to. markwork of. different sizes, such as tools and dies. The type is set up on the type assembly table. 4 also. mounted on post I.

The pantograph support arm Ii has one end in the form of a split sleevev which is vertically adjusted on the post I. The pantograph support arm can also be swung to any position about the post I and then locked by means of. the threaded handle 5 which tightens the support sleeve for arm 6 on the post I.

The work table support arm 2 is provided with a locating groove oruline 'l' and the post I is provided with a corresponding line 8. The work table is. provided with a locating. line El and the work table support arm is provided with alocating line Iii. Lines 9 and Ill must bein alignment. and lines I and 8 must also be in alignment. before the work is marked, otherwise the marking will run aslant of the article being marked. Work table 3 is swiveled on its support arm 7. and Vernier lines 9 occur every ninety degrees so that whenever lines 9 and III are in alignment one edge II of the work table will be parallel with the edge I2 of the type assembly table. Vernier lines intermediate lines 9. can be provided for adjusting table 3 in case one desires to mark the work in a line not parallel to the lines of type on table 4. The type is assembled on the table 4 in grooves running parallel to edge I2. The pantograph is pivotally supported on arm 6 by means of. shaft or pivot pin It. The panto graph is adjustable to various sizes by means of the adjusting holes I5 in the arms of the pantograph and pins I6 which fit in holes E5.

The tracing pen or stylus ll is mounted on one end of the pantograph and is provided with a handle I8 by means of which the tracing pen is moved along the grooved letters of the type. The marking; can be done by any suitable scribing instrument, e. g., a diamond point, an electric needle, a vibrating scriber, a rotary engraving tool. For purposes of description, the scribing instrument is herein shown as a vibrating dia mend pointed tool 24.

The pantograph I4 comprises parallel arms 28 and 29 each of which comprises a single metal strip or bar. The other two parallel arms of the pantograph are double arms, the one arm com-- prising two metal strips or bars 3% and 3E and the other two metal strips or bars 32 and Arms 3i) and 3t are positioned one above the other and arms 32 and 33 are positioned one above the other. The connection between the arms of the pantograph. are designed so that the pantograph will move easily and accurately. The con-- nection between pantograph arm 29 and arms and. 31- is a permanent pivotal connection.

The pivotal connections between the arms at the other three corners of the pantograph parallelogram are designed so that the parallelogram can be manipulated easily and substantially at. the finger touch. As shown, arms 38 and 3| are connected to arm 28 by means of a pin or pintle I 6, the lower end of which is threaded or screwed into arm BI. Thrust bearing races are positioned. between arms 30 and 28 and between arms SI and 2'8. Thus, the joints between the pantographic arms are ball bearing joints. Thrust ballbearing races are also provided; in the connection between the pantograph and the pantographic support arm 6. Due to these ball bearing; joints the pan-tograph can be easily manipulated and the joints remain substanti'ally free from play at all times-these two features are important features conducing to the accuracy of the machine. Any wear in the joints can be taken up by simply tightening the pintle:

The adjustment openings I5 in arms 3! and 313. are threaded for receiving. the threaded ends of pins I-Ii. as above described.

The type assembly table 4 is provided with parallel grooves. 35;. These grooves are undercut or beveled as indicated. at 3 15, Fig. 7. The type 38 is. provided with a beveled edge or face 39 which makes an. acute angle with the bottom face 40 of the type. Thus. the beveled face 39 of the type will seat accurately in the undercut or beveled edge 31 of groove 36. The opposite edge or face 4| of the type should make an obtuse angle with bottom face 49. Face 4| is so inclined so that the piece of type can be removed from the type groove by lifting or pivoting the piece at face ll upwards about the corner between faces 39 and 40 as a pivot. Thus, face 5! must make an obtuse angle of a few degrees more than 90 in order to clear the face or edge of groove 36 opposite face 39 as the type is tilted out to remove the same. By way of example, an obtuse angle of 98 is satisfactory in the type shown. The obtuseness of the angle will vary depending on the dimensions of the type and groove 33. When the type 33 is seated in groove 36, the beveled edge 39 fits under the undercut or beveled edge 3i of the groove 39 to lock the type in place. The opposite edge 9| of the type, however, is free to swing upwardly or out of groove 36 because it does not interengage the opposite edge of groove 3'3. The type is purposely designed this way so that it can be readily removed from groove 3% by simply pulling or prying upwardly on edge ii, preferably with a small instrument such as a pick.

If the edge 6! were beveled in the same manner as edge 39, then the type could only be removed from the type assembly plate l by sliding the same longitudinally out of one end of the groove 35. It was to obviate this laborious method of removing thetype from the plate i that the bevel was omitted from edge 4!.

After the type is inserted in groove 33 and the proper legend set, the clamping blocks 45, having beveled edges 46 corresponding to the undercut 31 in grooves 36, are slid into the end of the groove 36, one on either side of the type, and pushed tight against the opposite ends of the type and then looked in place by the set screws 47. If beveled edge 39 is omitted from type 49, then when the clamps 65 are screwed in place the type will buckle or lift out of groove 36. The provision of a single beveled edge, such as 39, which interengages the undercut or beveled edge 37 of groove (it prevents this buckling and yet at the same time the type has the advantage of being readily lifted out of the groove 36. Thus, one can readily and easily change any number or numbers or any letter or letters in the legend without removing either the other letters or the clamps. This could not be done if the type had to be slid out of the end of the type groove 36.

In operation the type bearing whatever legend desired to be marked on the work is set up on the type assembly table 4. The work is clamped on the work table 3 and Vernier markings 9 and ID are aligned as well as markings I and 8 so that the marking on the work will be made parallel or in alignment with the letters on the type table i. Tables 3 and 4 are also aligned up so that edges II and i2 are parallel. The vibrator or electric needle is next inserted in sleeve 29. Sleeve 26 and stem preferably have lapped surfaces which also aids in the production of accurate markings. The vibrator or electric needle is then turned on. The operator next places the tracing pen I! in the type letter and then brings the diamond point or electric needle down upon the work. While holding the diamond point against the work, the operator traces the various letters in the type which is set up on the table t and these letters are reproduced by the diamond point on the work. The pantograph action causes the letters on the work to be smaller in size than the letters set up on the type table. Whenever the operator is through marking the work or any individual letter on the work he simply takes his hand off of the vibrator and spring 22 automatically raises the diamond point out of contact with the work. If one desires to etch the letters or marking, then the object to be marked is first coated with paraffin and then marked through the parafiin with this machine using a hard point. The object is next subjected to the acid or other etching solution in the conventional way and the marking etched into the object along the line scribed through the paraffin.

I claim:

1. In a pantographic marking machine the combination of a type assembly table having a groove therein with undercut downwardly and outwardly inclined longitudinal edges, type arranged to be set in said groove, said type having one edge beveled throughout its entire length and arranged to interengage one of the undercut longitudinal edges of said groove whereby the type can be removed from said groove by tilting the same upwardly about said beveled edge.

2. In a pantograph marking machine the combination of a type assembly table having a groove therein with undercut edges, type arranged to be set in said groove, said type having one edge or face inclined at an acute angle to the bottom face of the type to interengage one of the undercut edges of said groove, said type having the opposite edge or face inclined at an obtuse angle to the bottom face of said type whereby the type can be removed from said groove by tilting the same about said acutely inclined edge.

3. In a pantographic marking machine the combination of a type assembly table having a groove therein with a longitudinal side planar face inclined downwardly'and outwardly, type arranged to be set in said groove, said type having one edge or face inclined throughout its length at an acute angle to the bottom face of the type corresponding to the angle between the inclined side face and bottom face of said groove and arranged to interengage one of the faces of said groove, said type having the opposite edge or face inclined at an obtuse angle to the bottom face of said type whereby the type can be removed from said groove by tilting the same about said acutely inclined edge.

BERNARD W. SCHABOT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 835,680 Hanssen Nov. 13, 1906 1,395,489 Glover Nov. 1, 1921 192,907 Ellinwood July 10, 1877 238,882 Francis Mar. 15, 1881 1,471,869 Turner Oct. 23, 1923 2,268,654 Goddu et a1. Jan. 6, 1942 1,423,289 Worner July 18, 1922 852,036 Rollandet Apr. 30, 1907 FOREIGN PATENTS Number Country Date 26,064 Great Britain Dec. 9, 1898 

